DEA three phase transformer

What is the primary advantage of using a three-phase transformer over a single-phase transformer?

• A. Lower cost

• B. Smaller size y

• C. Higher efficiency

• D. Greater flexibilit

Which of the following is not a common application of three-phase transformers?

• A. Power generation

• B. Industrial power distribution

• C. Residential power distribution

• D. Electric vehicle charging

Which type of three-phase transformer provides a secondary voltage that is greater than the primary voltage?

• A. Step-up transformer

• B. Step-down transformer

• C. Isolation transformer

• D. Autotransformer

What is the maximum phase shift between the primary and secondary voltages of a three-phase transformer?

• A. 90 degrees

• B. 120 degrees

• C. 180 degrees

• D. 360 degrees

Which of the following is a common material used for the core of a three-phase transformer?

• A. Copper

• B. Aluminum

• C. Iron

• D. Silver

What is the name of the three-phase transformer connection where the primary and secondary windings share a common core?

• A. Delta-delta

• B. Delta-wye

• C. Wye-wye

• D. Autotransformer

In a three-phase transformer, what is the phase difference between the primary and secondary windings?

• a) 0 degrees

• b) 60 degrees

• c) 90 degrees

• d) 180 degrees

Which type of transformer is commonly used to step up or step down voltages in power systems?

• a) Autotransformer

• b) Distribution transformer

• c) Power transformer

• d) Isolation transformer

Which type of connection is commonly used for the windings of a three-phase transformer?

• a) Delta-delta

• b) Star-star

• c) Delta-star

• d) Star-delta

What is the typical frequency range of a three-phase transformer?

• a) 50-60 Hz

• b) 100-200 Hz

• c) 1-10 kHz

• d) 100-500 kHz